date and time created 91/03/07 10:23:53 by bostic
[unix-history] / usr / src / lib / libc / gen / fstab.c
... / ...
CommitLineData
1/*
2 * Copyright (c) 1980, 1988 Regents of the University of California.
3 * All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8#if defined(LIBC_SCCS) && !defined(lint)
9static char sccsid[] = "@(#)fstab.c 5.15 (Berkeley) %G%";
10#endif /* LIBC_SCCS and not lint */
11
12#include <sys/errno.h>
13#include <fstab.h>
14#include <unistd.h>
15#include <stdio.h>
16#include <stdlib.h>
17#include <string.h>
18
19static FILE *_fs_fp;
20static struct fstab _fs_fstab;
21static error();
22
23static
24fstabscan()
25{
26 register char *cp;
27#define MAXLINELENGTH 1024
28 static char line[MAXLINELENGTH];
29 char subline[MAXLINELENGTH];
30 int typexx;
31
32 for (;;) {
33 if (!(cp = fgets(line, sizeof(line), _fs_fp)))
34 return(0);
35/* OLD_STYLE_FSTAB */
36 if (!strpbrk(cp, " \t")) {
37 _fs_fstab.fs_spec = strtok(cp, ":\n");
38 _fs_fstab.fs_file = strtok((char *)NULL, ":\n");
39 _fs_fstab.fs_type = strtok((char *)NULL, ":\n");
40 if (_fs_fstab.fs_type) {
41 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX))
42 continue;
43 _fs_fstab.fs_mntops = _fs_fstab.fs_type;
44 _fs_fstab.fs_vfstype =
45 strcmp(_fs_fstab.fs_type, FSTAB_SW) ?
46 "ufs" : "swap";
47 if (cp = strtok((char *)NULL, ":\n")) {
48 _fs_fstab.fs_freq = atoi(cp);
49 if (cp = strtok((char *)NULL, ":\n")) {
50 _fs_fstab.fs_passno = atoi(cp);
51 return(1);
52 }
53 }
54 }
55 goto bad;
56 }
57/* OLD_STYLE_FSTAB */
58 _fs_fstab.fs_spec = strtok(cp, " \t\n");
59 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#')
60 continue;
61 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n");
62 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n");
63 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n");
64 if (_fs_fstab.fs_mntops == NULL)
65 goto bad;
66 _fs_fstab.fs_freq = 0;
67 _fs_fstab.fs_passno = 0;
68 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) {
69 _fs_fstab.fs_freq = atoi(cp);
70 if ((cp = strtok((char *)NULL, " \t\n")) != NULL)
71 _fs_fstab.fs_passno = atoi(cp);
72 }
73 strcpy(subline, _fs_fstab.fs_mntops);
74 for (typexx = 0, cp = strtok(subline, ","); cp;
75 cp = strtok((char *)NULL, ",")) {
76 if (strlen(cp) != 2)
77 continue;
78 if (!strcmp(cp, FSTAB_RW)) {
79 _fs_fstab.fs_type = FSTAB_RW;
80 break;
81 }
82 if (!strcmp(cp, FSTAB_RQ)) {
83 _fs_fstab.fs_type = FSTAB_RQ;
84 break;
85 }
86 if (!strcmp(cp, FSTAB_RO)) {
87 _fs_fstab.fs_type = FSTAB_RO;
88 break;
89 }
90 if (!strcmp(cp, FSTAB_SW)) {
91 _fs_fstab.fs_type = FSTAB_SW;
92 break;
93 }
94 if (!strcmp(cp, FSTAB_XX)) {
95 _fs_fstab.fs_type = FSTAB_XX;
96 typexx++;
97 break;
98 }
99 }
100 if (typexx)
101 continue;
102 if (cp != NULL)
103 return(1);
104
105bad: /* no way to distinguish between EOF and syntax error */
106 error(EFTYPE);
107 }
108 /* NOTREACHED */
109}
110
111struct fstab *
112getfsent()
113{
114 if (!_fs_fp && !setfsent() || !fstabscan())
115 return((struct fstab *)NULL);
116 return(&_fs_fstab);
117}
118
119struct fstab *
120getfsspec(name)
121 register const char *name;
122{
123 if (setfsent())
124 while (fstabscan())
125 if (!strcmp(_fs_fstab.fs_spec, name))
126 return(&_fs_fstab);
127 return((struct fstab *)NULL);
128}
129
130struct fstab *
131getfsfile(name)
132 register const char *name;
133{
134 if (setfsent())
135 while (fstabscan())
136 if (!strcmp(_fs_fstab.fs_file, name))
137 return(&_fs_fstab);
138 return((struct fstab *)NULL);
139}
140
141setfsent()
142{
143 if (_fs_fp) {
144 rewind(_fs_fp);
145 return(1);
146 }
147 if (_fs_fp = fopen(_PATH_FSTAB, "r"))
148 return(1);
149 error(errno);
150 return(0);
151}
152
153void
154endfsent()
155{
156 if (_fs_fp) {
157 (void)fclose(_fs_fp);
158 _fs_fp = NULL;
159 }
160}
161
162static
163error(err)
164 int err;
165{
166 char *p;
167
168 (void)write(STDERR_FILENO, "fstab: ", 7);
169 (void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1);
170 p = strerror(err);
171 (void)write(STDERR_FILENO, p, strlen(p));
172 (void)write(STDERR_FILENO, "\n", 1);
173}